700073 is the Pin Code of Chittaranjan Avenue , Kolkata which is placed at Kolkata district, in West Bengal state. Postal index number is the full form of PIN and it is the mix up of 6 digit number that You can also call Postal Code, Pin Code, and Zip Code, that express each and every post offices with a separate number that is partitioned into three sections like, Postal Code of Chittaranjan Avenue is 700073 in which the beginning digit like 7 that explain region of Postal Code means Calcutta and the second digit like 0 that indicate the sub region and the third means 0 is used as short districts means, Kolkata is the district of Chittaranjan Avenue and the last three digits means 073 are used to display the Post Offices.